#include <iostream>
#include <fstream>
#include <string.h>
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
int l1,l2,i,z[2000005],sol,v[2000005];
char s1[4000005],s2[2000005];

void zf(char p[])
{
    int l, r;
    int n = strlen(p+1);
    z[1] = 0;
    l = 0;
    r = 0;
    for(i = 1; i <= n; i++){
        if ( i <= r )
            z[i] = min(z[i - l + 1], r - i + 1);
        while( i + z[i] - 1 <= n && p[ i + z[i]] == p[z[i]+1])
            z[i]++;
        if(i + z[i] - 1 >= r)
        {
            r = i + z[i] - 1;
            l = i;
        }
    }
}
int main()
{
    f>>s1+1;
    f>>s2+1;
    l1=strlen(s1+1);
    l2=strlen(s2+1);
    s1[l1+1]='#';
    strcat(s1+1,s2+1);
    zf(s1);
    for(i = 1;i <= l1 + l2 + 1; i++){
        if(z[i]==l1){
            sol++;
            if(sol<=1000)
                v[sol]=i-l1-2;
        }
    }
    g<<sol<<'\n';
    sol=min(sol,1000);
    for(i = 1; i <= sol; i++)
        g<<v[i]<<" ";
    return 0;
}